/**
 * @fileoverview Visual Studio compatible formatter
 * @author Ronald Pijnacker
 */

"use strict";

//------------------------------------------------------------------------------
// Helper Functions
//------------------------------------------------------------------------------

/**
 * Returns the severity of warning or error
 * @param {object} message message object to examine
 * @returns {string} severity level
 * @private
 */
function getMessageType(message) {
    if (message.fatal || message.severity === 2) {
        return "error";
    } else {
        return "warning";
    }
}


//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------

module.exports = function(results) {

    var output = "",
        total = 0;

    results.forEach(function(result) {

        var messages = result.messages;

        total += messages.length;

        messages.forEach(function(message) {

            output += result.filePath;
            output += "(" + (message.line || 0);
            output += message.column ? "," + message.column : "";
            output += "): " + getMessageType(message);
            output += message.ruleId ? " " + message.ruleId : "";
            output += " : " + message.message;
            output += "\n";

        });

    });

    if (total === 0) {
        output += "no problems";
    } else {
        output += "\n" + total + " problem" + (total !== 1 ? "s" : "");
    }

    return output;
};
